While it certainly isn't selling badly, The Royal Trap is not selling as fast as Long Live The Queen did on its launch. I wouldn't jump to conclusions about that, since there are all kinds of possible reasons behind that... although I can already predict what some of the pet theories will be.
1. Serendipity - I had the Steam launch for Magical Diary at the same time (on purpose) which probably brought more visitors to the site to try out the new game.
2. Marketing - I pushed LLTQ at more review sites than I did The Royal Trap, and ran more ads. I haven't quite figured out a good short fast pitch for TRT.
3. Wider Appeal - LLTQ has more market crossover because of the crunchy numbers and dark/political elements combined with the cuteness. TRT isn't just a pure visual novel, it's a WALL OF TEXT, and despite my efforts to point out the intrigue and plot rollercoaster aspects, it's probably mostly drawing the otome crowd.
I enjoy writing plot rollercoasters but it does give me trouble figuring out my advertising sometimes when I don't want to give away all the ridiculous stuff that's going to happen, but it's the ridiculous surprises that make a game interesting, if you see the problem...